Single and double cup brush



1961 R. F. TILGNER 3,005,221

SINGLE AND DOUBLE CUP BRUSH Filed July 1, 1959 2 Sheets-Sheet 1 INVENTOR. {44/24 f? 7/4 omsq Oct. 24, 1961 R. F. TILGNER SINGLE AND DOUBLE CUP BRUSH 2 Sheets-Sheet 2 Filed July 1, 1959 FIGS FIG.6

INVENTOR. (41PM A7 77A owt/e Armevzy -lock the assembly together.

easily obtained at but slight expense.

United States 3,005,221 SINGLE AND DOUBLE CUP BRUSH Ralph F. Tilgner, Ellicott City, Md, assignor to Pittsburgh Plate Glass flompany, Allegheny County, Pin, a

corporation of Pennsylvania Filed July 1, 1959, Ser. No. 824,376 14 (Ilaims. (Cl. ---180) This invention relates to rotary brushes and it has particular relation to rotary brushes of the so-called cup type, in which the fill material is disposed in approximately parallel relationship with respect to the axis of the brush and is so held the bases of the bristle tufts.

It has heretofore been suggested, as shown in the patent to Wilhide, No. 2,534,891, to form rotary brushes by disposing in an outer cup-like member, one or more annular discs having holes formed perimetrically therein for the reception of bunches of fill material (usually tufts of wire) inserted through the holes and being doubled and then twisted to secure the bunches in place. In the prior art construction, a second cup or disc member was disposed upon the disc containing the tufts of fill material -and the cups were secured together to clamp the discs by means of a hub member inserted through axially formed openings in the cups and the disc, and having the ends thereof so flanged over upon the faces of the cups as to The hub member itself was provided with a central bore which was screw threaded, whereby to permit it to be threaded upon the end of an appropriate driving shaft. The formation of the hub mer'nbersin this prior art construction involved a machining operation which was comparatively expensive. Also, in the operation of the brushes, the threads in the hub members might tend to jam on the shaft and it was difficult to break them loose, whereby to permit the removal of the brush from the shaft.

This invention contemplates the provision of a brush structure of the cup-type, involving a hub structure that can be assembled from standard parts which are used for many different applications and which, therefore, are In particular, the invention comprises as one feature, the provision. of a hub structure embodying a central piece of tubing which can be inserted in the central opening of the cup and disc elements of the brush, and swaged or flanged over securely to hold the assembly together. As a further fea- 'ture, the invention contemplates the securing of a comtom of the cup is appropriately slotted and dented to provide pockets adapted to receive a punch-like instrumenttowhich impacts can be applied in order to break a jam between the threads of the nut and the shaft upon which the brush is mounted.

For a better understanding of the invention, reference by a confining cup disposed about atent Patented Oct. 24., 1961 ice may now be had to the accompanying drawings in which- FIG. 1 is a section of one embodiment of brush constructed in accordance with the provisions of the present invention.

FIG. 2 is a bottom view of a cup brush constructed in accordance with the invention and applying to either FIG. 1 or to FIG. 2.

FIG. 3 is a partial sectional view of a slightly modified form of the invention.

FIG. 4 is a view partly in section and partly in phantom of a further form of the invention.

FIG. 5 is an isometric detail of a clip for use in the construction shown in FIG. 4.

FIG. 6 is a sectional view in partial assembly of certain parts which may be used in still another modification of the invention.

FIG. 7 is an isometric detail of a clip for use with the construction shown in FIG. 6.

The structures as shown in FIGS. 1 and 3 of the drawings are respectively for a brush having a single disc having tufts of fill material disposed in the perimeter thereof, and a brush having a pair of superposed discs, both of which discs are provided with knotted tufts of fill material disposed therein.

The brush structure illustrated in FIG. 3 is substantially the same as that of FIG. 1, except for the inclusion of a plurality of the discs having tufts of fill material about its perimeter. The bottom view of the brush shown in FIG. 3 may also be regarded as being the same as that shown in FIG. 2 of the drawings.

In the construction shown in FIG. 1, a cup element is indicated at 10 and is provided with a central opening adapted to receive a tubular member 11, providing a part of the hub structure of the brush. An annular brush ring 12 is disposed about the tubular member 11 within the cup and is formed with an inner cylindrical flange 13, which may have its edge seated upon the bottomof the cup. The outer perimeter of the brush ringer disc '12 is formed with a series of spaced holes 14 having tufts of fill material 16 knotted therein. This fill material usually is of a springy wire such as steel or brass, or other material which will retain its twist. The tufts are inserted in the holes in the perimeter of the disc and are doubled and twisted as indicated at 17 to secure them from dis placement. The tufts are held in approximately parallel relationship to the axis of the brush by the side wall of the cup 10.

Upon the top of the ring 12 is disposed a second cup 18 which is relatively shallow and having a central opening fitting about the tubular member 11. The cup element 18 has a rim 19 engaging the sides of the bristle tufts to prevent them from swinging inwardly. The tubular member 11 is upset or flanged at both ends as indicated at 20, to lock the assembly together as a single unit.

Means for holding the brush'upon the end of a drive shaft S comprises a nut 21 disposed within the tubular member 11. The nut may be threaded to screw upon the end of a threaded shaft or arbor, or it may be merely bored without being threaded, in event other means to secure itupon the shaft are to be used. It may be permanently secured in place within the tubular member as by welding or. brazing as indicated at 21'. It-is an advantage of the present construction that the brazing or welding operation can be performed before the tubular member is inserted in the brush assembly, thus obviating any possibility of damaging the fil-l material by the heat involved in the brazing or welding operation. The tubular member may also be of hexagonal or othershape, to fit the nut, thus increasing the security of the drive between the brush and the shaft.

Further means to hold the nut 21 in place and to provide a direct drive from the shaft S to cup 10 is illustrated as comprising flaps or tabs 22 integrally formed with the cup element 19 by appropriately radially slitting the bottom of the cup, bending the resultant flaps up viilld back to leave openings 23 and to overlay and engage the nut in the tubular member. The flaps prevent the nut from dropping out of the tubular member through the bottom thereof. If desired, the tips of the flaps and the nut may also be secured together as by spot welding, indicated at W. The latter feature is optional. lfdesired, the nut may be left loose in the tubular member and a direct drive between the shaft of the brush and .the brush may be obtained through the flaps 22 in the manner to be described. There is then no liklihood of ,elippage of the tubular member 11 during rotation of the shaft. The, metal of the bottom of the cup element 10 may be slotted as indicated at 26, and the metal on one side of the slot may be dented outwardly to provide poclget 27 into which a punch or other stylus-like instrument can be inserted to receive the impacts of a hammer thus to transmit the impacts to the nut in order break any jam which may occur between the threads .ofthenut and the Corresponding threads of a supporting shaft- The embodiment of the invention shown in FIG. 3 is similar to that of FIG. 1, except for the provision of a .SdQQlfld ring element coaxially stacked upon the first and having brush tufts or knots disposed in openings about .ithe perimeter thereof. The ring elements are indicated respectively as 3.0 and 31.

Also, .as shown in FIG. 3, the rings 30 and 31 do not have solid cylindrical internal flanges corresponding to -.fla11ges.13, but theinner edges of the rings are formed one or more pairs of parallel slits, and the tabs thus formed are bent downwardly to form lugs 13,,.

iT-he lugs upon the lower ring fit within the openings 23,,

.in the bottom of cup 10 these openings being ofiset respect .to the axis of the cup, and the lugs upon :the upper ring fit within the openings 13 left by the down- ..ward' bending of the lugs upon the lower ring. This 1. arrangement assures a positive drive between the cup 10,, and both of the rings.

The assembly as shown in FIG. 3 is in other respects substantially the same as that shown in FIG. 1. The same reference numerals, but with subscript letter a attached for-purposes of distinction, are applied to FIG. 3. It-Wlll be observed that the ring member 30 shown in FIG. 3 is of lesser diameter than the ring member 31, in order to provide two nested rows of bristles.

Obviously, additional ring members may be provided -inorder to give still further rows of bristles, if so desired.

Thebrushes shown may be mounted upon the threaded end-portions 34 and 334, of the shafts S and S and the shafts are formed with-shoulders 36 and 36 The flaps -22or -22 are clamped between the nuts 21 or 21 and the shoulders 36 or 36,,. The flaps, by reason of the clamping action, act to transmit driving torque from ":the shafts S or 8,, to the brush. This drive may .be in iod'gformingtabs such asztabs 22 integral with the outer touris -l wland. .In th o tr t on, a outer cup 4 is formed with a side wall 41 and a bottom 42, the latter being provided with a pair of parallel slots 43 adapted to receive the legs 44 of an inverted U-shaped clip 46. The legs provide flaps or tabs corresponding to flaps or tabs 22 and are connected together by a transverse member 47 having a hole 48 formed therein and being designed to receive tubular member 49 corresponding to tubular member 11 in FIG. 1.

The tubular member 49 also receives a nut 51, which is the same as nut 21. An annular disc 52 is disposed about member 49 and has holes 53 for twisted tufts 54 of wire fill material formed therein.

Lugs 56 are provided about the inner periphery of the disc 52 and are so spaced as to straddle the portion 47 of clip 46 to provide a positive drive between cup 40 and the disc 52. v

An inner cup 57 is also disposed upon tubular member 49 and its edge portion 58 clamps the tufts of fill material against the wall 41.

The disc 52 and the cups 40 and 57 are clamped together in assembled relationship by integral flanges 59 and 61 upon the tubular member 49.

To complete the assembly, the extremities of legs-44 are bent radially inwardly as indicated at 62, $1 5 hqldil g nut 51 from dropping out and alsoproviding a rnember against which the nut can bear when it is threaded upon an arbor (not shown) to provide a positive drive between cup 40 and the arbor. In FIG. 4, the legs of the clip 46 are indicated as extending downward. It not precluded to invert the clip so that transverse portion 47 is disposed outside of cup 40 and portions 62 are disposed within. Obviously, the portions 62 should then be shortened to clear member 49.

In the construction illustrated in FIGS. '6 and '7, an outer cup 70 similar to cup 40 is provided. However, the U-shaped clip element 46 is replaced by a pair of L-shaped clip members 71, each having a leg 72 extending through a slot 73 in the bottom of the cup and providing flaps or tabs corresponding to elements 22 of FIG. 1. The lower portions of legs 72 are bent inwardly to accomplish the function of portions 62 in the construction shown in FIG. 4. Since, aside from the clips 71, .the construction is the same as that of FIG. 4, it has not been considered to be necessary to repeat the showing of the duplicative parts. i

The forms of the invention as shown and described are to be considered as being by way of illustration. :It will be apparent to those skilled in the art that numerous modifications may be made therein without departure from the spirit of the invention or the scope of the appended claims.

I claim:

1. A cup brush comprising a cup element, a brush ring disposed within the cup element and having peripheral openings formed therein with tufts of bristle material disposed in the openings, a second cup element disposed upon the brush ring, a tubular member disposed within central openings formed through the cup elements and the brush ring, and having the ends thereof flanged over to lock the cup elements and the brush ring inassembled relationship, a nut disposed within the tubular member and being threaded, whereby it can be threaded upon the end of a driving shaft, and flaps projecting from below the bottom of the first-mentioned cup and beingbent radially inwardly across the lower face of the nut to hold the nut in place and to provide a drive between the cup and said driving shaft.

2. A construction as defined in claim 1 in which the bottom of the first-mentioned cup elementis slottedto provide said flaps which are doubled over to lock the nut in the tubular member.

3. A construction as defined in claim 1 in whichmthe bottom of the cup is formed with slots, having dents formed upon one side thereof, providing ,pocketSIiQr the reception of an end of a punch element.

4. A cup brush assembly comprising a cupelement having a central opening formed in the bottom thereof, a nut disposed in the opening and being adapted to be threaded upon the end of a driven shaft, a brush ring having tufts of fill material spaced about the perimeter thereof disposed in the cup with the tufts bearing against the side wall of the cup, means for clamping the brush ring in the cup, the bottom of said cup having radially inwardly opening U-shaped slots formed therein to provide flaps, the flaps being radially inwardly bent and having tips overlapping the nut and being adapted to be clamped between the nut and a peripheral shoulder near the end of the drive shaft.

5. A cup brush assembly comprising a cup element having a central opening formed in the bottom thereof, a nut disposed in the opening, a brush ring having tufts of fill material spaced about the perimeter thereof disposed in the cup with the tufts bearing against the side wall of the cup, means for clamping the brush ring in the cup, the bottom of said cup having radially inwardly opening U-shaped slots formed therein to provide flaps, the flaps being radially inwardly bent and having tips overlapping the nut and being adapted to be clamped between the end of a drive shaft for the brush and the nut, said ring having downwardly extending lugs projecting into the openings formed by bending of the flaps.

6. A cup brush assembly as defined in claim 4 in which a second ring also having bristle tufts, is coaxially disposed upon the first-mentioned ring, the first-mentioned ring having downwardly extending lugs projecting into the openings formed in the bottom of the cup by bending of the flaps, and the second-mentioned ring also having downwardly extending lugs engaging openings in the first-mentioned ring to provide a positive drive between the cup and the rings.

7. A cup brush comprising a cup element, an annular brush ring disposed within the cup element, and having peripheral openings formed therein with tufts of bristle material disposed in the openings, a second cup element disposed upon the brush ring, a tubular member disposed within central openings formed through the cup elements and the brush ring, and having the ends thereof flanged over to lock the cup elements and the brush ring in assembled relationship, and a nut disposed within the tubular member and being threaded, whereby it can be threaded upon the end of a driving shaft, the bottom of the first cup element having at least one axially off set opening formed therein and said brush ring having a lug projected into the opening to provide a positive drive between the cups and the brush ring.

8. A cup brush assembly comprising an outer cup element having a central opening formed in the bottom thereof, a nut disposed in the opening, an annular disc constituting a brush ring having tufts of fill material spaced about the perimeter thereof disposed in the outer cup with the tufts bearing against the side walls of the cup, means for clamping the brush ring in the cup, the bottom of the cup being provided with flaps radially inwardly bent and having the tips thereof overlapping the nut, and being adapted to be clamped between the nut and a shoulder upon the end of a drive shaft for the brush whereby to provide a drive between the shaft and the cup.

9. A cup brush assembly comprising a cup element having a central opening formed in the bottom thereof, a nut disposed in the opening, an annular disc constituting a brush ring having tufts of fill material spaced about the perimeter thereof disposed in the cup with the tufts bearing against the side wall of the cup, means for clamping the ring in the cup, the bottom of the cup having pairs of slots formed therein, clip elements providing tabs, disposed in the slots, the tabs being downwardly extending and radially inwardly bent and overlapping the nut to hold the same in position.

10. A cup brush comprising a cup element, an annular disc constituting a brush ring disposed within the cup element, and having peripheral openings formed there'- in, tufts of bristle material disposed in the openings, an inner cup element disposed within the circle of tufts and clamping the same against the wall of the firstmentioned cup, said cup elements having axial openings in the bottoms thereof, a tubular member extending coaxially through the cups and the ring, and being provided with end flanges clamping them together in assembled relationship, a nut disposed within the tubular member and being adapted to be threaded upon an arbor, and flaps extending downwardly from the bottom of the first-mentioned cup member and being radially inwardly bent to hold the nut in place within the tubular member.

11. A cup brush assembly comprising an outer cup element, an annular disc constituting a brush ring disposed within the cup element and having peripheral openings formed therein, and tufts of bristle material disposed within the openings, an inner cup element disposed upon the ring and engaging the tufts to clamp them against the walls of the first-mentioned cup element, a tubular member extending through the cup elements and the ring and being flanged to clamp them together in assembled relationship, a nut disposed within the tubular member and being threaded to receive the end of a driving arbor, the bottom of the first-mentioned cup having a slot formed therein and an annular clip element having a. leg extending downwardly through the slot, and being provided with a flap bent radially inwardly to engage the nut and hold the same in position within the tubular member.

12. A cup brush comprising an outer cup element, an annular disc constituting a brush ring disposed within the cup element and having peripheral openings formed therein with tufts of bristle material disposed within the openings, a second cup element disposed upon the ring and having the periphery thereof engaging the tufts of bristle material to clamp them against the wall of the first-mentioned cup element, the cup elements having axial openings formed in the bottoms thereof, a tubular member extending through the openings in the cup elements and the ring, and being flanged to clamp them together in assembled relationship, a nut disposed within the tub-ular member, the bottom of the first-mentioned cup being slotted, a U-shaped clip element having legs extending through the slots, the intermediate connecting portion of the clip elements being pierced to receive the tubular member, the legs of the U-shaped member being radially inwardly bent to engage and hold the nut in place within the tubular member.

13. A cup brush comprising an outer cup element, an annular disc constituting a brush ring disposed Within the outer cup element, and having peripheral openings formed therein with tufts of bristle material disposed within the openings, a second cup element disposed upon the ring, said cup elements having axial openings formed therein, a tubular member extending through the openings and the ring, and having flanged end portions holding the rings and the cup elements in assembled relationship, a nut disposed within the tubular member and being threaded to receive a threaded end of a driving shaft,

, the bottom of the first-mentioned cup element having slots formed therein, clip elements disposed within the slots, one end of each clip element being angularly bent within the cup to prevent displacement with respect to the cup, the other end of the clip element being radially inwardly bent to hold the nut from displacement from the tubular member.

14. A cup brush assembly comprising an outer cup element, an annular disc constituting a brush ring disposed within the cup element and having peripheral openings formed therein, and tufts of bristle material disposed within the openings, an inner cup element disposed upon the ring and engaging the tufts to clamp them against the walls of the first-mentioned cup element, a tubular member extending through the cup elements and gagingphe clip within the @1510 provide a positive drive b wen the ng an the cu References. Cited in the file of this patent UNITED STATES PATENTS Niel e 1 120 fiyewer t- 12, 19.09 Bi clgel et a1. Nov. 24, 1236 Nels Ap ,3 9, l'iet erson et a1. Jan. Q, 1959 Patent No. 3,005,221 October 24,, 1961 Ralph E, Tilgner ars in the above numbered 1386:

that error appe etters Patent should read as It is hereby certified ent requiring correction and that the said L corrected below,

Column 6, line 27, and column 7, each occurrence, read angular and Sealed this 9th day of Octohe line 5, for "annular",

Signed r 1962,

(SEAL) Attest: ERNEST w. SWIDER VI L. LA D Commissioner of Pate] Attesting Officer 

